Changeset 25821 in vbox for trunk/include

Timestamp:

Jan 14, 2010 8:26:10 AM (15 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

56598

Message:

iprt/cdefs.h: builtin_constant_p for RT_BSWAP_* with gcc

File:

• trunk/include/iprt/cdefs.h (modified) (3 diffs)

trunk/include/iprt/cdefs.h

@@ -1246 +1246 @@
 # define RT_BSWAP_U64(u64)  RT_BSWAP_U64_C(u64)
 #elif defined(__GNUC__)
-/** @todo use __builtin_constant_p? */
-# define RT_BSWAP_U64(u64)  ASMByteSwapU64(u64)
+# define RT_BSWAP_U64(u64)  (__builtin_constant_p((u64)) \
+                            ? RT_BSWAP_U64_C(u64) : ASMByteSwapU64(u64))
 #else
 # define RT_BSWAP_U64(u64)  ASMByteSwapU64(u64)
@@ -1257 +1257 @@
 # define RT_BSWAP_U32(u32)  RT_BSWAP_U32_C(u32)
 #elif defined(__GNUC__)
-/** @todo use __builtin_constant_p? */
-# define RT_BSWAP_U32(u32)  ASMByteSwapU32(u32)
+# define RT_BSWAP_U32(u32)  (__builtin_constant_p((u32)) \
+                            ? RT_BSWAP_U32_C(u32) : ASMByteSwapU32(u32))
 #else
 # define RT_BSWAP_U32(u32)  ASMByteSwapU32(u32)
@@ -1268 +1268 @@
 # define RT_BSWAP_U16(u16)  RT_BSWAP_U16_C(u16)
 #elif defined(__GNUC__)
-/** @todo use __builtin_constant_p? */
-# define RT_BSWAP_U16(u16)  ASMByteSwapU16(u16)
+# define RT_BSWAP_U16(u16)  (__builtin_constant_p((u16)) \
+                            ? RT_BSWAP_U16_C(u16) : ASMByteSwapU16(u16))
 #else
 # define RT_BSWAP_U16(u16)  ASMByteSwapU16(u16)